Air conditioner



FIG. 1 is a front, top and right side perspective view of an air conditioner showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a right view thereof.

The bottom plan view is omitted because it is the mirror image of the top plan view. The left side view is omitted because it is the mirror image to the right side view. 

CLAIM The ornamental design for an air conditioner, as shown and described. 